title: A patient with a paced rhythm presenting with chest pain and hypotension.
authors.affiliation: Department of Emergency Medicine, San Francisco General Hospital, University of California, San Francisco.
authors.forename: Sarah G
authors.initials: SG
authors.lastname: Schaaf
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Tabas
authors.forename: Stephen W
authors.initials: SW
authors.lastname: Smith
mesh_terms: D000369:Aged, 80 and over; D000787:Angina Pectoris / Q000209:etiology* / Q000503:physiopathology; D001281:Atrial Fibrillation / Q000150:complications / Q000503:physiopathology / Q000628:therapy*; D054059:Coronary Occlusion / Q000150:complications* / Q000175:diagnosis* / Q000628:therapy; D004562:Electrocardiography; D005260:Female; D006801:Humans; D007022:Hypotension / Q000209:etiology* / Q000503:physiopathology; D010138:Pacemaker, Artificial